The French word "merde" actually means "shit", but it is also used for wishing somebody good luck. The following note (undated) is from Marlene Dietrich to opera singer Maria Callas. I'm not sure what the note was for, but Dietrich was possibly wishing Callas luck with a performance.
Via: the last goddess
And my love
This photo was taken in October 1956, when Maria Callas had her debut at the Metropolitan Opera in New York. Callas was photographed with Meneghini (her then husband) and Marlene Dietrich.